Jeffrey Williams argues that the district court's denial of his motion to disclose the identity of a confidential informant violated his due process rights, that the Sentencing Guidelines denied him fundamental fairness and due process, and that the court applied the Guidelines improperly. We affirm.

In July 1988 Officer Hascall obtained a search warrant for a residence in Portland. The supporting affidavit contained information from a confidential informant who had purchased cocaine at that residence from "John Doe", described as a black man, 20 to 25 years old, 5'8" to 5'9", 180-190 pounds, with a dark complexion and a "jeri" curl hair style.

When Officer Hascall executed the warrant, he found Williams on the back porch of the house. He discovered also seven rocks of crack cocaine, a semi-automatic weapon in a bedroom closet, a revolver under a cushion in the living room, and $768 in cash. Williams also had $149 on his person. At that time, he admitted selling cocaine and made a number of incriminating statements about his drug activities.

He was indicted for possession with intent to distribute cocaine, 21 U.S.C. Sec. 841(a)(1), and pleaded not guilty. After a bench trial at which the court found him guilty, it sentenced him to 33 months imprisonment, followed by three years of supervised release.

Williams contends that his due process rights were violated when the district court failed to reveal the identity of the confidential informant. After Williams requested disclosure, the court held an in camera interview of Officer Hascall and denied the request. Later it asked for questions from both counsel and conducted a second in camera interview with Officer Hascall and the informant. Again, it denied Williams' motion.

We review for abuse of discretion the denial of a motion to compel disclosure of an informant's identity. United States v. Johnson, 886 F.2d 1120, 1122 (9th Cir.1989) (citing United States v. Fixen, 780 F.2d 1434, 1439 (9th Cir.1986)). The defendant bears the burden of demonstrating the need for disclosure, Johnson, 886 F.2d at 1122, and a mere suspicion that the information will prove helpful will not suffice. Id. (citing United States v. Buffington, 815 F.2d 1292, 1299 (9th Cir.1987)).

The government has a limited privilege to withhold the identity of a confidential informant. Roviaro v. United States, 353 U.S. 53, 59, 77 S. Ct. 623, 627, 1 L. Ed. 2d 639 (1957); United States v. Sai Keung Wong, 886 F.2d 252, 255 (9th Cir.1989). That privilege must give way where the disclosure of the identity or contents of a communication "is relevant and helpful to the defense of an accused, or is essential to a fair determination of a cause." Roviaro, 353 U.S. at 60-61, 77 S.Ct. at 627-28; Sai Keung Wong, 886 F.2d at 255. The district court must balance

the public interest in protecting the flow of information against the individual's right to prepare his defense. Whether a proper balance renders nondisclosure erroneous must depend on the particular circumstances of each case, taking into consideration the crime charged, the possible defenses, the possible significance of the informer's testimony, and other relevant factors.

Roviaro, 353 U.S. at 62, 77 S.Ct. at 629; Johnson, 886 F.2d at 1122.

Williams argues that he needed the informant to explain the discrepancies between the informant's description of John Doe and Williams. We disagree.

Williams has not shown that the informant's testimony would be relevant and helpful to his defense. The government did not contend at trial that Doe and Williams were the same person. Nor did it charge Williams with possession with intent to distribute cocaine based on the drug transaction with the informant. See Johnson, 886 F.2d at 1122. That information was used only to obtain the warrant to search.1 The government's charge related to the crack cocaine found in the house when Hascall executed the search warrant. The extent of the informant's usefulness was to establish probable cause to search as a result of which the cocaine was seized. See United States v. Whitney, 633 F.2d 902, 911 (9th Cir.1980) (government charge predicated on heroin found in a camera seized from the defendant and not on informant's observations of drug transactions); Fixen, 780 F.2d at 1439 (no right to disclosure where sole ground for seeking information is to determine probable cause to search).

The district court held an appropriate in camera hearing, finding that the police used the informant to locate crack houses and that he was not personally acquainted with Williams or anyone with whom Williams had contact. See United States v. Ordonez, 737 F.2d 793, 809-10 (9th Cir.1984). It concluded that the informant's activities were limited to small purchases of cocaine under circumstances that "would make it impossible for the informant to be of any assistance to the defendant in the prosecution of his defense."

Having reviewed the transcript of the in camera hearing, we find that the district court properly considered the crime charged, the possible defenses, and the possible significance of the informant's testimony. See United States v. Zavala, 839 F.2d 523, 528 (9th Cir.1988). Williams has not demonstrated a need for the informant's identity.2II. Constitutionality of Sentencing Guidelines

Williams attacks the Sentencing Guidelines, contending that they deny him fundamental fairness and due process. He has not explained his arguments and instead adopts the defendant's brief in United States v. Belgard, 894 F.2d 1092 (9th Cir.1990).

He attacks the role of the probation officer, arguing that when the officer determines factual matters in the presentence report, he deprives the defendant of a neutral and detached fact finder. In Belgard, 894 F.2d at 1098-99, we rejected the argument that the probation officer's role violated either the separation of powers doctrine or due process.

Williams contends that the district court applied the Guidelines improperly in refusing to reduce the offense level because of his mitigating role in the offense.

Although the district court has discretion under United States Sentencing Commission, Guidelines Manual, Ch. 3, Part B, Sec. 3B1.2 (hereafter Guidelines) to decrease the defendant's offense level for minimal or minor participation in a crime, it should do so infrequently.3 See United States v. Gillock, 886 F.2d 220, 222 (9th Cir.1989) (citing Commentary to Sec. 3B1.2).

A finding that the defendant did not play a minimal or minor role in the crime depends heavily on the facts of the case. Id. We will not disturb this factual finding unless it is clearly erroneous. Id. (citing United States v. Sanchez-Lopez, 879 F.2d 541, 557 (9th Cir.1989)).

Williams argues that, because he was the "caretaker" of the crack house rather than the owner, his role was minimal or minor.4 The court found that although he did not own the crack house, he was operating it when police executed the search warrant, and was intending to make sales. For the reasons given by the district court, we find no error in refusing to reduce the offense level for minimal or minor participation.

Finally, Williams argues that if the district judge had believed he had the authority under 18 U.S.C. Sec. 3553(b) to depart downward from the Guidelines, he would have given him a more lenient sentence.5 We disagree.

Here, the district court concluded, "I do not find that I have the authority [to depart] in this case, nor do I find facts which would lead me to believe I should depart." The district judge clearly indicated that, even if he had the authority to depart, there were no facts to justify departing downward. This latter finding constitutes a discretionary refusal to depart. It is sufficient to support the sentence, and we are without jurisdiction to review it. See United States v. Morales, 898 F.2d 99, 101 (9th Cir.1990) (district court's discretionary refusal to depart downward from Guidelines not appealable).

AFFIRMED.